172740422477 has 8 divisors (see below), whose sum is σ = 207808027200. Its totient is φ = 140270418144.

The previous prime is 172740422441. The next prime is 172740422507. The reversal of 172740422477 is 774224047271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172740422477 - 2²⁸ = 172471987021 is a prime.

It is a super-3 number, since 3×172740422477³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172740422417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649399952 + ... + 649400217.

It is an arithmetic number, because the mean of its divisors is an integer number (25976003400).

Almost surely, 2^172740422477 is an apocalyptic number.

It is an amenable number.

172740422477 is a deficient number, since it is larger than the sum of its proper divisors (35067604723).

172740422477 is a wasteful number, since it uses less digits than its factorization.

172740422477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298800195.

The product of its (nonzero) digits is 1229312, while the sum is 47.

The spelling of 172740422477 in words is "one hundred seventy-two billion, seven hundred forty million, four hundred twenty-two thousand, four hundred seventy-seven".